// Copyright 2009, Willow Garage, Inc. All rights reserved.
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#ifndef MESSAGE_FILTERS__CONNECTION_HPP_
#define MESSAGE_FILTERS__CONNECTION_HPP_

#include <functional>
#include <memory>

#include "message_filters/visibility_control.hpp"

namespace message_filters
{

class noncopyable
{
protected:
  noncopyable() {}
  ~noncopyable() {}
  noncopyable(const noncopyable &) = delete;
  noncopyable & operator=(const noncopyable &) = delete;
};

/**
 * \brief Encapsulates a connection from one filter to another (or to a user-specified callback)
 */
class Connection
{
public:
  using VoidDisconnectFunction = std::function<void (void)>;
  using WithConnectionDisconnectFunction = std::function<void (const Connection &)>;
  MESSAGE_FILTERS_PUBLIC Connection() {}
  MESSAGE_FILTERS_PUBLIC Connection(const VoidDisconnectFunction & func);

  /**
   * \brief disconnects this connection
   */
  MESSAGE_FILTERS_PUBLIC void disconnect();

private:
  VoidDisconnectFunction void_disconnect_;
  WithConnectionDisconnectFunction connection_disconnect_;
};

}  // namespace message_filters

#endif  // MESSAGE_FILTERS__CONNECTION_HPP_
